FIELD: ferrous metallurgy. SUBSTANCE: invention relates to manufacturing oil and gas duct pipes from low-carbon steel resistant to corrosion cracking in hydrogen sulfide-containing media. Pipes at temperature of the end of rolling are cooled in air, heated to 1080-1120 C, cooled in water, reheated to 880-920 C, cooled in water once again, and finally heated to 740- 760 C and cooled in water. Drawback is effected at 680-700 C followed by cooling in air. EFFECT: increased corrosion immunity. 1 tbl
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Authors
Dates
1997-08-10—Published
1996-06-10—Filed